Sidar Jabari of Zhalfir — ruling 1

Sidar Jabari must be on the battlefield or in the command zone at the moment you attack with one or more Knights and also as the triggered ability tries to resolve. Notably, if Sidar Jabari is on the battlefield and its eminence ability triggers, but it's put into the command zone before that ability resolves, that ability won't do anything as it resolves. This is because an object that changes zones is considered a new object.

Sidar Jabari of Zhalfir : règles, fonctionnement et interactions (MTG)

Sidar Jabari of Zhalfir is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Eminence — Whenever you attack with one or more Knights, if Sidar Jabari is in the command zone or on the battlefield, draw a card, then discard a card. Flying, first strike Whenever Sidar Jabari deals combat damage to a player, return target Knight creature card from your graveyard to the battlefield.

How it works : Sidar Jabari of Zhalfir

Original English text — Wizards of the Coast / Scryfall

#1April 14, 2023· Wizards of the Coast
Sidar Jabari must be on the battlefield or in the command zone at the moment you attack with one or more Knights and also as the triggered ability tries to resolve. Notably, if Sidar Jabari is on the battlefield and its eminence ability triggers, but it's put into the command zone before that ability resolves, that ability won't do anything as it resolves. This is because an object that changes zones is considered a new object.
No other card is named in this ruling.